mirror of
https://github.com/thingsboard/thingsboard-gateway
synced 2025-10-26 22:31:42 +08:00
748 lines
38 KiB
Python
748 lines
38 KiB
Python
# Copyright 2022. ThingsBoard
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import random
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import ssl
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import string
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from queue import Queue
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from re import fullmatch, match, search
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from threading import Thread
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from time import sleep, time
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import simplejson
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from paho.mqtt.client import Client
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from thingsboard_gateway.connectors.connector import Connector, log
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from thingsboard_gateway.tb_utility.tb_loader import TBModuleLoader
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from thingsboard_gateway.tb_utility.tb_utility import TBUtility
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class MqttConnector(Connector, Thread):
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def __init__(self, gateway, config, connector_type):
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super().__init__()
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self.__gateway = gateway # Reference to TB Gateway
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self._connector_type = connector_type # Should be "mqtt"
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self.config = config # mqtt.json contents
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self.__log = log
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self.statistics = {'MessagesReceived': 0, 'MessagesSent': 0}
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self.__subscribes_sent = {}
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# Extract main sections from configuration ---------------------------------------------------------------------
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self.__broker = config.get('broker')
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self.__mapping = []
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self.__server_side_rpc = []
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self.__connect_requests = []
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self.__disconnect_requests = []
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self.__attribute_requests = []
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self.__attribute_updates = []
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mandatory_keys = {
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"mapping": ['topicFilter', 'converter'],
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"serverSideRpc": ['deviceNameFilter', 'methodFilter', 'requestTopicExpression', 'valueExpression'],
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"connectRequests": ['topicFilter'],
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"disconnectRequests": ['topicFilter'],
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"attributeRequests": ['topicFilter', 'topicExpression', 'valueExpression'],
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"attributeUpdates": ['deviceNameFilter', 'attributeFilter', 'topicExpression', 'valueExpression']
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}
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# Mappings, i.e., telemetry/attributes-push handlers provided by user via configuration file
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self.load_handlers('mapping', mandatory_keys['mapping'], self.__mapping)
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# RPCs, i.e., remote procedure calls (ThingsBoard towards devices) handlers
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self.load_handlers('serverSideRpc', mandatory_keys['serverSideRpc'], self.__server_side_rpc)
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# Connect requests, i.e., telling ThingsBoard that a device is online even if it does not post telemetry
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self.load_handlers('connectRequests', mandatory_keys['connectRequests'], self.__connect_requests)
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# Disconnect requests, i.e., telling ThingsBoard that a device is offline even if keep-alive has not expired yet
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self.load_handlers('disconnectRequests', mandatory_keys['disconnectRequests'], self.__disconnect_requests)
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# Shared attributes direct requests, i.e., asking ThingsBoard for some shared attribute value
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self.load_handlers('attributeRequests', mandatory_keys['attributeRequests'], self.__attribute_requests)
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# Attributes updates requests, i.e., asking ThingsBoard to send updates about an attribute
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self.load_handlers('attributeUpdates', mandatory_keys['attributeUpdates'], self.__attribute_updates)
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# Setup topic substitution lists for each class of handlers ----------------------------------------------------
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self.__mapping_sub_topics = {}
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self.__connect_requests_sub_topics = {}
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self.__disconnect_requests_sub_topics = {}
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self.__attribute_requests_sub_topics = {}
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# Set up external MQTT broker connection -----------------------------------------------------------------------
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client_id = self.__broker.get("clientId", ''.join(random.choice(string.ascii_lowercase) for _ in range(23)))
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self._client = Client(client_id)
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self.setName(config.get("name", self.__broker.get(
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"name",
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'Mqtt Broker ' + ''.join(random.choice(string.ascii_lowercase) for _ in range(5)))))
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if "username" in self.__broker["security"]:
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self._client.username_pw_set(self.__broker["security"]["username"],
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self.__broker["security"]["password"])
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if "caCert" in self.__broker["security"] \
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or self.__broker["security"].get("type", "none").lower() == "tls":
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ca_cert = self.__broker["security"].get("caCert")
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private_key = self.__broker["security"].get("privateKey")
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cert = self.__broker["security"].get("cert")
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if ca_cert is None:
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self._client.tls_set_context(ssl.SSLContext(ssl.PROTOCOL_TLSv1_2))
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else:
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try:
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self._client.tls_set(ca_certs=ca_cert,
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certfile=cert,
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keyfile=private_key,
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cert_reqs=ssl.CERT_REQUIRED,
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tls_version=ssl.PROTOCOL_TLSv1_2,
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ciphers=None)
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except Exception as e:
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self.__log.error("Cannot setup connection to broker %s using SSL. "
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"Please check your configuration.\nError: ",
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self.get_name())
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self.__log.exception(e)
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if self.__broker["security"].get("insecure", False):
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self._client.tls_insecure_set(True)
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else:
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self._client.tls_insecure_set(False)
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# Set up external MQTT broker callbacks ------------------------------------------------------------------------
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self._client.on_connect = self._on_connect
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self._client.on_message = self._on_message
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self._client.on_subscribe = self._on_subscribe
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self._client.on_disconnect = self._on_disconnect
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# self._client.on_log = self._on_log
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# Set up lifecycle flags ---------------------------------------------------------------------------------------
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self._connected = False
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self.__stopped = False
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self.daemon = True
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self.__msg_queue = Queue()
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self.__workers_thread_pool = []
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self.__max_msg_number_for_worker = config.get('maxMessageNumberPerWorker', 10)
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self.__max_number_of_workers = config.get('maxNumberOfWorkers', 100)
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self._on_message_queue = Queue()
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self._on_message_thread = Thread(name='On Message', target=self._process_on_message, daemon=True)
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self._on_message_thread.start()
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def load_handlers(self, handler_flavor, mandatory_keys, accepted_handlers_list):
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if handler_flavor not in self.config:
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self.__log.error("'%s' section missing from configuration", handler_flavor)
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else:
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for handler in self.config.get(handler_flavor):
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discard = False
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for key in mandatory_keys:
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if key not in handler:
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# Will report all missing fields to user before discarding the entry => no break here
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discard = True
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self.__log.error("Mandatory key '%s' missing from %s handler: %s",
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key, handler_flavor, simplejson.dumps(handler))
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else:
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self.__log.debug("Mandatory key '%s' found in %s handler: %s",
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key, handler_flavor, simplejson.dumps(handler))
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if discard:
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self.__log.error("%s handler is missing some mandatory keys => rejected: %s",
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handler_flavor, simplejson.dumps(handler))
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else:
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accepted_handlers_list.append(handler)
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self.__log.debug("%s handler has all mandatory keys => accepted: %s",
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handler_flavor, simplejson.dumps(handler))
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self.__log.info("Number of accepted %s handlers: %d",
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handler_flavor,
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len(accepted_handlers_list))
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self.__log.info("Number of rejected %s handlers: %d",
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handler_flavor,
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len(self.config.get(handler_flavor)) - len(accepted_handlers_list))
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def is_connected(self):
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return self._connected
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def open(self):
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self.__stopped = False
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self.start()
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def run(self):
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try:
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self.__connect()
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except Exception as e:
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self.__log.exception(e)
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try:
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self.close()
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except Exception as e:
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self.__log.exception(e)
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while True:
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if self.__stopped:
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break
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elif not self._connected:
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self.__connect()
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self.__threads_manager()
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sleep(.2)
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def __connect(self):
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while not self._connected and not self.__stopped:
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try:
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self._client.connect(self.__broker['host'],
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self.__broker.get('port', 1883))
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self._client.loop_start()
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if not self._connected:
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sleep(1)
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except ConnectionRefusedError as e:
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self.__log.error(e)
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sleep(10)
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def close(self):
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self.__stopped = True
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try:
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self._client.disconnect()
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except Exception as e:
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log.exception(e)
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self._client.loop_stop()
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self.__log.info('%s has been stopped.', self.get_name())
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def get_name(self):
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return self.name
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def __subscribe(self, topic, qos):
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message = self._client.subscribe(topic, qos)
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try:
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self.__subscribes_sent[message[1]] = topic
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except Exception as e:
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self.__log.exception(e)
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def _on_connect(self, client, userdata, flags, result_code, *extra_params):
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result_codes = {
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1: "incorrect protocol version",
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2: "invalid client identifier",
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3: "server unavailable",
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4: "bad username or password",
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5: "not authorised",
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}
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if result_code == 0:
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self._connected = True
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self.__log.info('%s connected to %s:%s - successfully.',
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self.get_name(),
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self.__broker["host"],
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self.__broker.get("port", "1883"))
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self.__log.debug("Client %s, userdata %s, flags %s, extra_params %s",
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str(client),
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str(userdata),
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str(flags),
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extra_params)
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self.__mapping_sub_topics = {}
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# Setup data upload requests handling ----------------------------------------------------------------------
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for mapping in self.__mapping:
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try:
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# Load converter for this mapping entry ------------------------------------------------------------
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# mappings are guaranteed to have topicFilter and converter fields. See __init__
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default_converter_class_name = "JsonMqttUplinkConverter"
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# Get converter class from "extension" parameter or default converter
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converter_class_name = mapping["converter"].get("extension", default_converter_class_name)
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# Find and load required class
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module = TBModuleLoader.import_module(self._connector_type, converter_class_name)
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if module:
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self.__log.debug('Converter %s for topic %s - found!', converter_class_name,
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mapping["topicFilter"])
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converter = module(mapping)
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else:
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self.__log.error("Cannot find converter for %s topic", mapping["topicFilter"])
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continue
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# Setup regexp topic acceptance list ---------------------------------------------------------------
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regex_topic = TBUtility.topic_to_regex(mapping["topicFilter"])
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# There may be more than one converter per topic, so I'm using vectors
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if not self.__mapping_sub_topics.get(regex_topic):
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self.__mapping_sub_topics[regex_topic] = []
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self.__mapping_sub_topics[regex_topic].append(converter)
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# Subscribe to appropriate topic -------------------------------------------------------------------
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self.__subscribe(mapping["topicFilter"], mapping.get("subscriptionQos", 1))
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self.__log.info('Connector "%s" subscribe to %s',
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self.get_name(),
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TBUtility.regex_to_topic(regex_topic))
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except Exception as e:
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self.__log.exception(e)
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# Setup connection requests handling -----------------------------------------------------------------------
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for request in [entry for entry in self.__connect_requests if entry is not None]:
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# requests are guaranteed to have topicFilter field. See __init__
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self.__subscribe(request["topicFilter"], request.get("subscriptionQos", 1))
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topic_filter = TBUtility.topic_to_regex(request.get("topicFilter"))
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self.__connect_requests_sub_topics[topic_filter] = request
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# Setup disconnection requests handling --------------------------------------------------------------------
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for request in [entry for entry in self.__disconnect_requests if entry is not None]:
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# requests are guaranteed to have topicFilter field. See __init__
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self.__subscribe(request["topicFilter"], request.get("subscriptionQos", 1))
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topic_filter = TBUtility.topic_to_regex(request.get("topicFilter"))
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self.__disconnect_requests_sub_topics[topic_filter] = request
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# Setup attributes requests handling -----------------------------------------------------------------------
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for request in [entry for entry in self.__attribute_requests if entry is not None]:
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# requests are guaranteed to have topicFilter field. See __init__
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self.__subscribe(request["topicFilter"], request.get("subscriptionQos", 1))
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topic_filter = TBUtility.topic_to_regex(request.get("topicFilter"))
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self.__attribute_requests_sub_topics[topic_filter] = request
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else:
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if result_code in result_codes:
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self.__log.error("%s connection FAIL with error %s %s!", self.get_name(), result_code,
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result_codes[result_code])
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else:
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self.__log.error("%s connection FAIL with unknown error!", self.get_name())
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def _on_disconnect(self, *args):
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self._connected = False
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self.__log.debug('"%s" was disconnected. %s', self.get_name(), str(args))
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def _on_log(self, *args):
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self.__log.debug(args)
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def _on_subscribe(self, _, __, mid, granted_qos, *args):
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log.info(args)
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try:
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if granted_qos[0] == 128:
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self.__log.error('"%s" subscription failed to topic %s subscription message id = %i',
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self.get_name(),
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self.__subscribes_sent.get(mid), mid)
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else:
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self.__log.info('"%s" subscription success to topic %s, subscription message id = %i',
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self.get_name(),
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self.__subscribes_sent.get(mid), mid)
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except Exception as e:
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self.__log.exception(e)
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# Success or not, remove this topic from the list of pending subscription requests
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if self.__subscribes_sent.get(mid) is not None:
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del self.__subscribes_sent[mid]
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def put_data_to_convert(self, converter, message, content) -> bool:
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if not self.__msg_queue.full():
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self.__msg_queue.put((converter.convert, message.topic, content), True, 100)
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return True
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return False
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def _save_converted_msg(self, topic, data):
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self.__gateway.send_to_storage(self.name, data)
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self.statistics['MessagesSent'] += 1
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self.__log.debug("Successfully converted message from topic %s", topic)
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def __threads_manager(self):
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if len(self.__workers_thread_pool) == 0:
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worker = MqttConnector.ConverterWorker("Main", self.__msg_queue, self._save_converted_msg)
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self.__workers_thread_pool.append(worker)
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worker.start()
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number_of_needed_threads = round(self.__msg_queue.qsize() / self.__max_msg_number_for_worker, 0)
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threads_count = len(self.__workers_thread_pool)
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if number_of_needed_threads > threads_count < self.__max_number_of_workers:
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thread = MqttConnector.ConverterWorker(
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"Worker " + ''.join(random.choice(string.ascii_lowercase) for _ in range(5)), self.__msg_queue,
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self._save_converted_msg)
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self.__workers_thread_pool.append(thread)
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thread.start()
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elif number_of_needed_threads < threads_count and threads_count > 1:
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worker: MqttConnector.ConverterWorker = self.__workers_thread_pool[-1]
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if not worker.in_progress:
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worker.stopped = True
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self.__workers_thread_pool.remove(worker)
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def _on_message(self, client, userdata, message):
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self._on_message_queue.put((client, userdata, message))
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def _process_on_message(self):
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while not self.__stopped:
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if not self._on_message_queue.empty():
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client, userdata, message = self._on_message_queue.get()
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self.statistics['MessagesReceived'] += 1
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content = TBUtility.decode(message)
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# Check if message topic exists in mappings "i.e., I'm posting telemetry/attributes" -------------------
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topic_handlers = [regex for regex in self.__mapping_sub_topics if fullmatch(regex, message.topic)]
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if topic_handlers:
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# Note: every topic may be associated to one or more converter.
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# This means that a single MQTT message
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# may produce more than one message towards ThingsBoard. This also means that I cannot return after
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# the first successful conversion: I got to use all the available ones.
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# I will use a flag to understand whether at least one converter succeeded
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request_handled = False
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for topic in topic_handlers:
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available_converters = self.__mapping_sub_topics[topic]
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for converter in available_converters:
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try:
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if isinstance(content, list):
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for item in content:
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request_handled = self.put_data_to_convert(converter, message, item)
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if not request_handled:
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self.__log.error(
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'Cannot find converter for the topic:"%s"! Client: %s, User data: %s',
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message.topic,
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str(client),
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str(userdata))
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else:
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request_handled = self.put_data_to_convert(converter, message, content)
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except Exception as e:
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log.exception(e)
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if not request_handled:
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self.__log.error('Cannot find converter for the topic:"%s"! Client: %s, User data: %s',
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message.topic,
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str(client),
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str(userdata))
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# Note: if I'm in this branch, this was for sure a telemetry/attribute push message
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# => Execution must end here both in case of failure and success
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continue
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# Check if message topic exists in connection handlers "i.e., I'm connecting a device" -----------------
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topic_handlers = [regex for regex in self.__connect_requests_sub_topics if
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fullmatch(regex, message.topic)]
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if topic_handlers:
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for topic in topic_handlers:
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handler = self.__connect_requests_sub_topics[topic]
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found_device_name = None
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found_device_type = 'default'
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# Get device name, either from topic or from content
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if handler.get("deviceNameTopicExpression"):
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device_name_match = search(handler["deviceNameTopicExpression"], message.topic)
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if device_name_match is not None:
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found_device_name = device_name_match.group(0)
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elif handler.get("deviceNameJsonExpression"):
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found_device_name = TBUtility.get_value(handler["deviceNameJsonExpression"], content)
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# Get device type (if any), either from topic or from content
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if handler.get("deviceTypeTopicExpression"):
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device_type_match = search(handler["deviceTypeTopicExpression"], message.topic)
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found_device_type = device_type_match.group(0) if device_type_match is not None else \
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handler[
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"deviceTypeTopicExpression"]
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elif handler.get("deviceTypeJsonExpression"):
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found_device_type = TBUtility.get_value(handler["deviceTypeJsonExpression"], content)
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if found_device_name is None:
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self.__log.error("Device name missing from connection request")
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continue
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# Note: device must be added even if it is already known locally: else ThingsBoard
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# will not send RPCs and attribute updates
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self.__log.info("Connecting device %s of type %s", found_device_name, found_device_type)
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self.__gateway.add_device(found_device_name, {"connector": self}, device_type=found_device_type)
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|
|
# Note: if I'm in this branch, this was for sure a connection message
|
|
# => Execution must end here both in case of failure and success
|
|
continue
|
|
|
|
# Check if message topic exists in disconnection handlers "i.e., I'm disconnecting a device" -----------
|
|
topic_handlers = [regex for regex in self.__disconnect_requests_sub_topics if
|
|
fullmatch(regex, message.topic)]
|
|
if topic_handlers:
|
|
for topic in topic_handlers:
|
|
handler = self.__disconnect_requests_sub_topics[topic]
|
|
|
|
found_device_name = None
|
|
found_device_type = 'default'
|
|
|
|
# Get device name, either from topic or from content
|
|
if handler.get("deviceNameTopicExpression"):
|
|
device_name_match = search(handler["deviceNameTopicExpression"], message.topic)
|
|
if device_name_match is not None:
|
|
found_device_name = device_name_match.group(0)
|
|
elif handler.get("deviceNameJsonExpression"):
|
|
found_device_name = TBUtility.get_value(handler["deviceNameJsonExpression"], content)
|
|
|
|
# Get device type (if any), either from topic or from content
|
|
if handler.get("deviceTypeTopicExpression"):
|
|
device_type_match = search(handler["deviceTypeTopicExpression"], message.topic)
|
|
if device_type_match is not None:
|
|
found_device_type = device_type_match.group(0)
|
|
elif handler.get("deviceTypeJsonExpression"):
|
|
found_device_type = TBUtility.get_value(handler["deviceTypeJsonExpression"], content)
|
|
|
|
if found_device_name is None:
|
|
self.__log.error("Device name missing from disconnection request")
|
|
continue
|
|
|
|
if found_device_name in self.__gateway.get_devices():
|
|
self.__log.info("Disconnecting device %s of type %s", found_device_name, found_device_type)
|
|
self.__gateway.del_device(found_device_name)
|
|
else:
|
|
self.__log.info("Device %s was not connected", found_device_name)
|
|
|
|
break
|
|
|
|
# Note: if I'm in this branch, this was for sure a disconnection message
|
|
# => Execution must end here both in case of failure and success
|
|
continue
|
|
|
|
# Check if message topic exists in attribute request handlers "i.e., I'm asking for a shared attribute"
|
|
topic_handlers = [regex for regex in self.__attribute_requests_sub_topics if
|
|
fullmatch(regex, message.topic)]
|
|
if topic_handlers:
|
|
try:
|
|
for topic in topic_handlers:
|
|
handler = self.__attribute_requests_sub_topics[topic]
|
|
|
|
found_device_name = None
|
|
found_attribute_names = None
|
|
|
|
# Get device name, either from topic or from content
|
|
if handler.get("deviceNameTopicExpression"):
|
|
device_name_match = search(handler["deviceNameTopicExpression"], message.topic)
|
|
if device_name_match is not None:
|
|
found_device_name = device_name_match.group(0)
|
|
elif handler.get("deviceNameJsonExpression"):
|
|
found_device_name = TBUtility.get_value(handler["deviceNameJsonExpression"], content)
|
|
|
|
# Get attribute name, either from topic or from content
|
|
if handler.get("attributeNameTopicExpression"):
|
|
attribute_name_match = search(handler["attributeNameTopicExpression"], message.topic)
|
|
if attribute_name_match is not None:
|
|
found_attribute_names = attribute_name_match.group(0)
|
|
elif handler.get("attributeNameJsonExpression"):
|
|
found_attribute_names = list(filter(lambda x: x is not None,
|
|
TBUtility.get_values(
|
|
handler["attributeNameJsonExpression"],
|
|
content)))
|
|
|
|
if found_device_name is None:
|
|
self.__log.error("Device name missing from attribute request")
|
|
continue
|
|
|
|
if found_attribute_names is None:
|
|
self.__log.error("Attribute name missing from attribute request")
|
|
continue
|
|
|
|
self.__log.info("Will retrieve attribute %s of %s", found_attribute_names,
|
|
found_device_name)
|
|
self.__gateway.tb_client.client.gw_request_shared_attributes(
|
|
found_device_name,
|
|
found_attribute_names,
|
|
lambda data, *args: self.notify_attribute(
|
|
data,
|
|
found_attribute_names,
|
|
handler.get("topicExpression"),
|
|
handler.get("valueExpression"),
|
|
handler.get('retain', False)))
|
|
|
|
break
|
|
|
|
except Exception as e:
|
|
log.exception(e)
|
|
|
|
# Note: if I'm in this branch, this was for sure an attribute request message
|
|
# => Execution must end here both in case of failure and success
|
|
continue
|
|
|
|
# Check if message topic exists in RPC handlers --------------------------------------------------------
|
|
# The gateway is expecting for this message => no wildcards here, the topic must be evaluated as is
|
|
|
|
if self.__gateway.is_rpc_in_progress(message.topic):
|
|
log.info("RPC response arrived. Forwarding it to thingsboard.")
|
|
self.__gateway.rpc_with_reply_processing(message.topic, content)
|
|
continue
|
|
|
|
self.__log.debug("Received message to topic \"%s\" with unknown interpreter data: \n\n\"%s\"",
|
|
message.topic,
|
|
content)
|
|
|
|
sleep(.2)
|
|
|
|
def notify_attribute(self, incoming_data, attribute_name, topic_expression, value_expression, retain):
|
|
if incoming_data.get("device") is None or incoming_data.get("value", incoming_data.get('values')) is None:
|
|
return
|
|
|
|
device_name = incoming_data.get("device")
|
|
attribute_values = incoming_data.get('value') or incoming_data.get('values')
|
|
|
|
topic = topic_expression \
|
|
.replace("${deviceName}", str(device_name)) \
|
|
.replace("${attributeKey}", str(attribute_name))
|
|
|
|
if len(attribute_name) <= 1:
|
|
data = value_expression.replace("${attributeKey}", str(attribute_name[0])) \
|
|
.replace("${attributeValue}", str(attribute_values))
|
|
else:
|
|
data = simplejson.dumps(attribute_values)
|
|
|
|
self._client.publish(topic, data, retain=retain).wait_for_publish()
|
|
|
|
def on_attributes_update(self, content):
|
|
if self.__attribute_updates:
|
|
for attribute_update in self.__attribute_updates:
|
|
if match(attribute_update["deviceNameFilter"], content["device"]):
|
|
for attribute_key in content["data"]:
|
|
if match(attribute_update["attributeFilter"], attribute_key):
|
|
try:
|
|
topic = attribute_update["topicExpression"] \
|
|
.replace("${deviceName}", str(content["device"])) \
|
|
.replace("${attributeKey}", str(attribute_key)) \
|
|
.replace("${attributeValue}", str(content["data"][attribute_key]))
|
|
except KeyError as e:
|
|
log.exception("Cannot form topic, key %s - not found", e)
|
|
raise e
|
|
try:
|
|
data = attribute_update["valueExpression"] \
|
|
.replace("${attributeKey}", str(attribute_key)) \
|
|
.replace("${attributeValue}", str(content["data"][attribute_key]))
|
|
except KeyError as e:
|
|
log.exception("Cannot form topic, key %s - not found", e)
|
|
raise e
|
|
self._client.publish(topic, data,
|
|
retain=attribute_update.get('retain', False)).wait_for_publish()
|
|
self.__log.debug("Attribute Update data: %s for device %s to topic: %s", data,
|
|
content["device"], topic)
|
|
else:
|
|
self.__log.error("Cannot find attributeName by filter in message with data: %s", content)
|
|
else:
|
|
self.__log.error("Cannot find deviceName by filter in message with data: %s", content)
|
|
else:
|
|
self.__log.error("Attribute updates config not found.")
|
|
|
|
def server_side_rpc_handler(self, content):
|
|
self.__log.info("Incoming server-side RPC: %s", content)
|
|
|
|
# Check whether one of my RPC handlers can handle this request
|
|
for rpc_config in self.__server_side_rpc:
|
|
if search(rpc_config["deviceNameFilter"], content["device"]) \
|
|
and search(rpc_config["methodFilter"], content["data"]["method"]) is not None:
|
|
|
|
# This handler seems able to handle the request
|
|
self.__log.info("Candidate RPC handler found")
|
|
|
|
expects_response = rpc_config.get("responseTopicExpression")
|
|
defines_timeout = rpc_config.get("responseTimeout")
|
|
|
|
# 2-way RPC setup
|
|
if expects_response and defines_timeout:
|
|
expected_response_topic = rpc_config["responseTopicExpression"] \
|
|
.replace("${deviceName}", str(content["device"])) \
|
|
.replace("${methodName}", str(content["data"]["method"])) \
|
|
.replace("${requestId}", str(content["data"]["id"]))
|
|
|
|
expected_response_topic = TBUtility.replace_params_tags(expected_response_topic, content)
|
|
|
|
timeout = time() * 1000 + rpc_config.get("responseTimeout")
|
|
|
|
# Start listenting on the response topic
|
|
self.__log.info("Subscribing to: %s", expected_response_topic)
|
|
self.__subscribe(expected_response_topic, rpc_config.get("responseTopicQoS", 1))
|
|
|
|
# Wait for subscription to be carried out
|
|
sub_response_timeout = 10
|
|
|
|
while expected_response_topic in self.__subscribes_sent.values():
|
|
sub_response_timeout -= 1
|
|
sleep(0.1)
|
|
if sub_response_timeout == 0:
|
|
break
|
|
|
|
# Ask the gateway to enqueue this as an RPC response
|
|
self.__gateway.register_rpc_request_timeout(content,
|
|
timeout,
|
|
expected_response_topic,
|
|
self.rpc_cancel_processing)
|
|
|
|
# Wait for RPC to be successfully enqueued, which never fails.
|
|
while self.__gateway.is_rpc_in_progress(expected_response_topic):
|
|
sleep(0.1)
|
|
|
|
elif expects_response and not defines_timeout:
|
|
self.__log.info("2-way RPC without timeout: treating as 1-way")
|
|
|
|
# Actually reach out for the device
|
|
request_topic: str = rpc_config.get("requestTopicExpression") \
|
|
.replace("${deviceName}", str(content["device"])) \
|
|
.replace("${methodName}", str(content["data"]["method"])) \
|
|
.replace("${requestId}", str(content["data"]["id"]))
|
|
|
|
request_topic = TBUtility.replace_params_tags(request_topic, content)
|
|
|
|
data_to_send_tags = TBUtility.get_values(rpc_config.get('valueExpression'), content['data'],
|
|
'params',
|
|
get_tag=True)
|
|
data_to_send_values = TBUtility.get_values(rpc_config.get('valueExpression'), content['data'],
|
|
'params',
|
|
expression_instead_none=True)
|
|
|
|
data_to_send = rpc_config.get('valueExpression')
|
|
for (tag, value) in zip(data_to_send_tags, data_to_send_values):
|
|
data_to_send = data_to_send.replace('${' + tag + '}', simplejson.dumps(value))
|
|
|
|
try:
|
|
self.__log.info("Publishing to: %s with data %s", request_topic, data_to_send)
|
|
self._client.publish(request_topic, data_to_send, retain=rpc_config.get('retain', False))
|
|
|
|
if not expects_response or not defines_timeout:
|
|
self.__log.info("One-way RPC: sending ack to ThingsBoard immediately")
|
|
self.__gateway.send_rpc_reply(device=content["device"], req_id=content["data"]["id"],
|
|
success_sent=True)
|
|
|
|
# Everything went out smoothly: RPC is served
|
|
return
|
|
|
|
except Exception as e:
|
|
self.__log.exception(e)
|
|
|
|
self.__log.error("RPC not handled: %s", content)
|
|
|
|
def rpc_cancel_processing(self, topic):
|
|
log.info("RPC canceled or terminated. Unsubscribing from %s", topic)
|
|
self._client.unsubscribe(topic)
|
|
|
|
class ConverterWorker(Thread):
|
|
def __init__(self, name, incoming_queue, send_result):
|
|
super().__init__()
|
|
self.stopped = False
|
|
self.setName(name)
|
|
self.setDaemon(True)
|
|
self.__msg_queue = incoming_queue
|
|
self.in_progress = False
|
|
self.__send_result = send_result
|
|
|
|
def run(self):
|
|
while not self.stopped:
|
|
if not self.__msg_queue.empty():
|
|
self.in_progress = True
|
|
convert_function, config, incoming_data = self.__msg_queue.get(True, 100)
|
|
converted_data = convert_function(config, incoming_data)
|
|
log.debug(converted_data)
|
|
self.__send_result(config, converted_data)
|
|
self.in_progress = False
|
|
else:
|
|
sleep(.2)
|